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在既有线上原位改建中桥，桥台无法按一般方式修建。本方法为：向既有桥台后路堤内顶入一小的箱形桥、并填实，作为新桥的台身，然后进行桥台上部一台帽、胸墙、翼墙等的施工。本实例中的桥台施工、以及桥墩的更换和加深基础、孔跨布置诸项技术，可供类似情况在设计与施工中参考，如浅基处理中的原位另建新桥，以及既有桥的扩孔以增力。排洪孔径或立交通道等。
In the existing online conversion of the bridge in situ, abutment can not be built in the usual manner. The method is as follows: Push in a small box-shaped bridge into the existing abutment abutment embankment and fill it up as a platform for Xinqiao, then carry out the construction of a cap, chest wall and wing wall at the upper part of the abutment. The bridge abutment construction in this case, as well as the replacement and deepening foundation of piers, the cross-hole arrangement technologies can be used for reference in similar design and construction projects. For example, in situ construction of new bridges in shallow foundation treatment and existing bridges Reaming to increase power. Flood discharge aperture or interchange and so on.